package cn.tedu;

public class dou13 {
    public static void main(String[] args) {
        new ze();
    }
}
class fe{
    {
        System.out.println(1);
    }
    public fe(){
        System.out.println(2);
    }
}
class ze extends fe{
    {
        System.out.println(3);
    }
    public ze(){
        super();
        System.out.println(4);
    }
}